DOI: 10.1002/2018JC013784
Scopus记录号: 2-s2.0-85050157204
论文题名: Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup
作者: Ardhuin F. ; Boutin G. ; Stopa J. ; Girard-Ardhuin F. ; Melsheimer C. ; Thomson J. ; Kohout A. ; Doble M. ; Wadhams P.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 8 起始页码: 5652
结束页码: 5668
语种: 英语
英文关键词: Arctic
; Beaufort
; SAR
; sea ice
; WAVEWATCH III
; wind-waves
英文摘要: Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice breakup by the waves. The possible influence of these processes is evaluated in the marginal ice zone of the Beaufort Sea, where extensive wave measurements were performed. The wave data includes in situ measurements and the first kilometer-scale map of wave heights provided by Sentinel-1 SAR imagery on 12 October 2015, up to 400 km into the ice. We find that viscous friction at the base of an ice layer gives a dissipation rate that may be too large near the ice edge, where ice is mostly in the form of pancakes. Further into the ice, where larger floes are present, basal friction is not sufficient to account for the observed attenuation. In both regions, the observed narrow directional wave spectra are consistent with a parameterization that gives a weak effect of wave scattering by ice floes. For this particular event, with a dominant wave period around 10 s, we propose that wave attenuation is caused by ice flexure combined with basal friction that is reduced when the ice layer is not continuous. This combination gives realistic wave heights, associated with a 100–200 km wide region over which the ice is broken by waves, as observed in SAR imagery. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113424
Appears in Collections: 气候减缓与适应
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作者单位: Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale, IUEM, Brest, France; Institute of Environmental Physics, University of Bremen, Bremen, Germany; Applied Physics Laboratory, University of Washington, Seattle, WA, United States; National Institute of Water and Atmospheric Research, Christchurch, New Zealand; PolarScientific Ltd., Appin, United Kingdom; Cambridge Polar Consultants Ltd., Cambridge, United Kingdom
Recommended Citation:
Ardhuin F.,Boutin G.,Stopa J.,et al. Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)